Issue --- E-mails & letter (urgent !!!)

Actually people that like E-mails or letters can be divided into two kinds. One is the old generation, another one is the young generation. Old generation people like our grand-parents, would definitely choose letters. It is because they think that letters are hardcopies which can hold in hands, and for letters, people need to write, which represents more love, care and consideration. They also think that use letters to communicate with each other would have the better sense of security. Young generation people such as teenagers, like to use E-mails to communicate with each other better. It is because certainly using E-mails is much quicker than using letters. Letters need to write but E-mails only need to move our fingers a bit to type. Young people use computer frequently, so it is very convenient for them to use computer to communicate with others. Moreover, businessmen and businesswomen, and also secretary etc, would also like to use E-mails for their work as it can deliver fast and handy.